Changing the Screen Brightness Programatically in Cupcake
For list of android tutorial click here
Previously we had blogged about on how to change the screen brightness in android pre cupcake and on cupcake, the android team had added an official way to change the brightness without the hacks. Here is how to use it:
WindowManager.LayoutParams lp = getWindow().getAttributes(); lp.screenBrightness = 100 / 100.0f; getWindow().setAttributes(lp);
References:
http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html#screenBrightness
http://groups.google.com/group/android-developers/browse_thread/thread/6de1cb84596a1c9b
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How do you make it work in a widget since getWindow() isn’t gonna work?
I would like to know how to do this from a widget as well.
Well this only changes the current activity,not the entire system..Do you know how to change the brightness level for the cellphone?
OK,I figure it out myself.All you have to do is start up an activity,shows a button.When you click that button,write the system settings,which is “screen_brightness” or sth.Then you use the method in this post to actually change it.After doing these,you can leave your activty,and the brightness level remains.